用jQuery增加HTML值点击/克隆?

I have this code:

我有这段代码:

<div id="clonedInput1" class="clonedInput">
              <div class="row" id="item1">  <!-- item -->

                <div class="col-md-6">
                  <!-- // -->
                  <label for="one">external_ref</label>
                  <input type="text" id="external_ref" name="item[0][external_ref]" class="form-control" value="<?php echo rand(1,9999); ?><?php echo strtr($date, array('-' => '', ' ' => '',':' =>'')); ?>">
                  <!-- // -->
                  <label for="one">style</label>
                  <input type="text" name="item[0][style]" class="form-control" value="mens">
                  <!-- // -->
                  <label for="one">size</label>
                  <input type="text" name="item[0][size]" class="form-control" value="large">
                  <!-- // -->
                  <label for="one">color</label>
                  <input type="text" name="item[0][color]" class="form-control" value="white">
                  <!-- // -->
                  <label for="one">print_location</label>
                  <input type="text" name="item[0][print_location]" class="form-control" value="front">
                </div>

                <div class="col-md-6">
                  <!-- // -->
                  <label for="one">quantity</label>
                  <input type="text" name="item[0][quantity]" class="form-control" value="2">
                  <!-- // -->
                  <label for="one">x_offset</label>
                  <input type="text" name="item[0][print_x_offset]" class="form-control" value="10">
                  <!-- // -->
                  <label for="one">y_offset</label>
                  <input type="text" name="item[0][print_y_offset]" class="form-control" value="10">
                  <!-- // -->
                  <label for="one">external_url</label>
                  <input type="text" name="item[0][external_url]" class="form-control" value="https://upload.wikimedia.org/wikipedia/commons/thumb/9/96/Sass_Logo_Color.svg/1280px-Sass_Logo_Color.svg.png">
                  <!-- // -->
                  <label for="one">external_thumbnail_url</label>
                  <input type="text" name="item[0][external_thumbnail_url]" class="form-control" value="https://upload.wikimedia.org/wikipedia/commons/thumb/9/96/Sass_Logo_Color.svg/1280px-Sass_Logo_Color.svg.png">
                </div><!-- end right -->
              </div><!-- end item -->
              <div class="actions">
                  <span class="clone btn btn-default">Clone</span>
                  <span class="remove btn btn-danger">Remove</span>
              </div>
          </div>
<div id="clonedIn